Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 2,355.0	$ 2,250.1	$ 2,377.7	$ 2,225.2
Net Income	105.6	107.2	227.5	223.2
Foreign currency translation adjustments	(113.1)	23.2	(135.7)	(21.2)
Pension and other postretirement liability adjustments (net of income tax benefits)	(1.4)	(1.7)	(2.9)	(3.3)
Change in fair value of derivative financial instruments, net of reclassifications	2.2	(0.2)	4.2	2.0
Dividends	(22.9)	(22.9)	(46.4)	(46.7)
Stock-based compensation expense	8.5	6.0	15.6	12.5
Stock purchased at fair market value	(44.3)		(144.3)	(26.3)
Stock option exercise activity	0.2	11.3	1.6	25.4
Payments related to tax withholding for stock-based compensation	(0.6)	(5.7)	(8.1)	(23.5)
Ending Balance	2,289.2	2,367.3	2,289.2	2,367.3
Pension and other postretirement liability adjustment, tax benefit	$ 0.5	$ 0.5	$ 1.0	$ 1.1
Dividends (in dollars per shares)	$ 0.31	$ 0.30	$ 0.61	$ 0.59
Stated Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 40.7	$ 40.7	$ 40.7	$ 40.7
Ending Balance	40.7	40.7	40.7	40.7
Other Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	795.4	761.3	786.9	740.7
Stock-based compensation expense	8.5	6.0	15.6	12.5
Stock option exercise activity	0.2	11.3	1.6	25.4
Ending Balance	804.1	778.6	804.1	778.6
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	1,711.1	1,429.0	1,616.4	1,339.5
Net Income	105.0	104.8	223.2	218.1
Dividends	(22.9)	(22.9)	(46.4)	(46.7)
Ending Balance	1,793.2	1,510.9	1,793.2	1,510.9
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(42.5)	(2.1)	(23.0)	41.3
Foreign currency translation adjustments	(114.2)	23.8	(134.2)	(20.2)
Pension and other postretirement liability adjustments (net of income tax benefits)	(1.4)	(1.7)	(2.9)	(3.3)
Change in fair value of derivative financial instruments, net of reclassifications	2.2	(0.2)	4.2	2.0
Ending Balance	(155.9)	19.8	(155.9)	19.8
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(233.6)	(53.4)	(126.1)	(9.3)
Stock purchased at fair market value	(44.3)		(144.3)	(26.3)
Payments related to tax withholding for stock-based compensation	(0.6)	(5.7)	(8.1)	(23.5)
Ending Balance	(278.5)	(59.1)	(278.5)	(59.1)
Non controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	83.9	74.6	82.8	72.3
Net Income	0.6	2.4	4.3	5.1
Foreign currency translation adjustments	1.1	(0.6)	(1.5)	(1.0)
Ending Balance	$ 85.6	$ 76.4	$ 85.6	$ 76.4